Nonresonant central exclusive production of charged-hadron pairs in proton-proton collisions at √𝑠 =13 TeV
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
The central exclusive production of charged-hadron pairs in 𝑝𝑝 collisions at a center-of-mass energy of 13 TeV is examined, based on data collected in a special high-𝛽* run of the LHC. The nonresonant continuum processes are studied with the invariant mass of the centrally produced two-pion system in the resonance-free region, 𝑚𝜋+𝜋− <0.7 or 𝑚𝜋+𝜋− >1.8 GeV. Differential cross sections as functions of the azimuthal angle between the surviving protons, squared exchanged four-momenta, and 𝑚𝜋+𝜋− are measured in a wide region of scattered proton transverse momenta, between 0.2 and 0.8 GeV, and for pion rapidities |𝑦| <2. A rich structure of interactions related to double-pomeron exchange is observed. A parabolic minimum in the distribution of the two-proton azimuthal angle is observed for the first time. It can be interpreted as an effect of additional pomeron exchanges between the protons from the interference between the bare and the rescattered amplitudes. After model tuning, various physical quantities are determined that are related to the pomeron cross section, proton-pomeron and meson-pomeron form factors, pomeron trajectory and intercept, and coefficients of diffractive eigenstates of the proton.
Date Issued
2024-06-01
Date Acceptance
2024-03-21
Citation
Physical Review D: Particles, Fields, Gravitation and Cosmology, 2024, 109 (11)
ISSN
1550-2368
Publisher
American Physical Society
Journal / Book Title
Physical Review D: Particles, Fields, Gravitation and Cosmology
Volume
109
Issue
11
Copyright Statement
© 2024 CERN, for the CMS and TOTEMs Collaboration Published by the American Physical Society under the terms of
the Creative Commons Attribution 4.0 International license.
Further distribution of this work must maintain attribution to
the author(s) and the published article’s title, journal citation,
and DOI. Funded by SCOAP3
.
the Creative Commons Attribution 4.0 International license.
Further distribution of this work must maintain attribution to
the author(s) and the published article’s title, journal citation,
and DOI. Funded by SCOAP3
.
License URL
Identifier
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.109.112013
Subjects
Astronomy & Astrophysics
BEHAVIOR
CROSS-SECTION
GLUEBALL
LHC
Physical Sciences
Physics
Physics, Particles & Fields
POMERON
SCATTERING
Science & Technology
Publication Status
Published
Article Number
112013
Date Publish Online
2024-06-11